Buckle up. We have well known opinion leaders, talking about transformation (where the service took them), sharing solid metrics, as well as embedding the actual client videos within the slider. So we're not just telling them, we're showing them. Dare I say this as good as a testimonial slider can get.
Loads to love here. On the UX front; the expansion of the arrows on hover and the subtle bounce animation on the cards. On the content front; highlighted takeaway up top, good avatars, their company positions plus brand logos for a bonus visual reminder.